Question

Solving trig equation $10\sin^2x + 10\sin x\cos x - \cos^2x - 2 = 0, -360 < x < 360$

score 103 · Answer 1 · 2018-02-16 02:04:27

103

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Solving trig equation $10\sin^2x + 10\sin x\cos x - \cos^2x - 2 = 0, -360 < x < 360$

Published on 16 Feb 2018 - 2:04

score 789 · Answer 2 · 2026-03-29 17:33:58

789

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If $x \cos\theta+y\sin\theta=a$ and $x\sin\theta-y\cos\theta=b$, then $\tan\theta=\frac{bx+ay}{ax-by}$. (Math Olympiad)

Published on 29 Mar 2026 - 17:33

score 1.2k · Answer 3 · 2026-03-26 06:25:36

1.2k

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Finding the resultant force on this diagram

Published on 26 Mar 2026 - 6:25

score 893 · Answer 4 · 2026-03-31 21:04:09

893

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How to calculate new X, Y coordinates of a moving object

Published on 31 Mar 2026 - 21:04

score 658 · Answer 5 · 2018-02-16 15:37:31

658

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Is a function periodic $f(x) = \cos (x) +\cos(x^2)$

Published on 16 Feb 2018 - 15:37

score 170 · Answer 6 · 2018-02-16 18:40:40

sum of the series $\cos \frac{\pi}{3}+ \frac{1}{2}\cos\frac{2\pi}{3}+\frac{1}{3}\cos \frac{3\pi}{3}+........$ is

score 69 · Answer 7 · 2026-03-25 13:13:33

69

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What is the result of multiplying $\sin x . \cos y$?

Published on 25 Mar 2026 - 13:13

score 914 · Answer 8 · 2018-02-17 01:48:41

914

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Differentiation of tanx gives different value

Published on 17 Feb 2018 - 1:48

score 176 · Answer 9 · 2026-03-25 15:41:25

176

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Is a following function periodic $f(x) =\tan x +\tan (\sqrt{2}x)$

Published on 25 Mar 2026 - 15:41

score 61 · Answer 10 · 2026-03-28 15:19:40

61

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Trigonometry inequality with 2 natural parameters.

Published on 28 Mar 2026 - 15:19

score 400 · Answer 11 · 2026-03-25 16:45:24

400

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Secant and Tangent identity

Published on 25 Mar 2026 - 16:45

score 91 · Answer 12 · 2018-02-17 17:43:06

91

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Simplify the equation $16\cos^6(t) + 16\sin^6(t) + 48\sin^2(t)\cos^2(t)$

Published on 17 Feb 2018 - 17:43

score 1.7k · Answer 13 · 2018-02-17 18:25:08

If $2\tan^2x - 5\sec x = 1$ has exactly $7$ distinct solutions for $x\in[0,\frac{n\pi}{2}]$, $n\in N$, then the greatest value of $n$ is?

score 88 · Answer 14 · 2026-03-22 15:46:55

88

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Prove the sum equation

Published on 22 Mar 2026 - 15:46

score 170 · Answer 15 · 2018-02-17 21:13:14

170

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Can these trig functions be reduced to the pythagorean theorem?

Published on 17 Feb 2018 - 21:13

List Question

Solving trig equation $10\sin^2x + 10\sin x\cos x - \cos^2x - 2 = 0, -360 < x < 360$

If $x \cos\theta+y\sin\theta=a$ and $x\sin\theta-y\cos\theta=b$, then $\tan\theta=\frac{bx+ay}{ax-by}$. (Math Olympiad)

Finding the resultant force on this diagram

How to calculate new X, Y coordinates of a moving object

Is a function periodic $f(x) = \cos (x) +\cos(x^2)$

sum of the series $\cos \frac{\pi}{3}+ \frac{1}{2}\cos\frac{2\pi}{3}+\frac{1}{3}\cos \frac{3\pi}{3}+........$ is

What is the result of multiplying $\sin x . \cos y$?

Differentiation of tanx gives different value

Is a following function periodic $f(x) =\tan x +\tan (\sqrt{2}x)$

Trigonometry inequality with 2 natural parameters.

Secant and Tangent identity

Simplify the equation $16\cos^6(t) + 16\sin^6(t) + 48\sin^2(t)\cos^2(t)$

If $2\tan^2x - 5\sec x = 1$ has exactly $7$ distinct solutions for $x\in[0,\frac{n\pi}{2}]$, $n\in N$, then the greatest value of $n$ is?

Prove the sum equation

Can these trig functions be reduced to the pythagorean theorem?

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